Pipe joint



R. E. EVARTS PIPE JOINT Fel 13,1940."

Filed .my 19, 1957 'lll'l Patented Felt.l 13,

UNITED 4STATES nrs :vom

anpnnammcnimmnssunttm. v Bastian-Blessing Co., Chicago, lll., a corporationof Illinois Application July 1s, 1931, semi No. 154.413

1 cam. (ci. zas-16s) This invention relates to a coupling and has for one object to provide a means for coupling a pipe or conduit to a suitably prepared member and to provide a simple and sufiiciently tight 5 joint therefor, which may bereadily put in and removed by the use of the lingers alone and without additional tools.

Another object is to providea coupling of this sort in which extremely accurate iitting and l matching of contacting parts is unnecessary.

Another object is to provide -a coupling which may be readily assembled without the use' of special tools or readily repaired in the eld without the use of special tools.

l Another object is to provide a coupling of the type indicated in which not merely the mechanical pressure furnished by the coupling itselfl but the iiuid pressure or the system to which the coupling is joined assists in making a leak-tight coupling or joint.

A still further object is to provide means for utilizing the coupling as a plug or analogous member where desired.

Other objects will appear from time to time in the specification and claim.

The invention is illustrated more or less diagrammatically in the accompanying drawing,

wherein Figure 1 is a side. elevation with parts broken away,-showing one form of inventionin use;

vFigure 2 is a longitudinal sectional detail taken on an enlarged scale at line 2'2 of Figure 1;

Figure 3 is a view similar to Figure 2 showing a modified form; Figure 4 is a longitudinal section-showing a "f further modication;

Figure 5 illustrates the coupling as applied to 4a plug. l Like parts are designated by like characters throughout the specincation and drawing. i

pling for attachment to any desired point of use.

At one end the tubular member may be outwardrelative dimensions of these discs may be great- I lyvaried.'1'heymaybeorthesamcthickness uid under pressure passes.

I is a tubular member associated with the couor, as shown in Figure 2, of dlli'erent thicknesses. Adjacent the disc 4 is a `friction washer 5 which is preferably provided with suilicient clearance 6 about the tube I so that it may rotate or move readily with respect to the tube. A packing mit 5- 1, threaded at 8 and providedwith portions 9 by means of which it may be readily rotated is positioned about the tube and in the assembled joint holds the parts in place. At its inner end it is preferably cut away as at I0 to provide a rel0 duced and relatively raised portion IIv which, when the joint is assembled, contacts the friction reducing washer 5.

In the particular form of the device shown in Figures l and 2, l2 is a tting which is hollow l.

and interiorly threaded as at I3 and may be secured to a pipe or any other desired point of attachment. Frequently it will be used as a connection to a tank in which or through which This member is threaded as at Il to receive the threaded portion 8 of the nut l. Interlorly from the threaded por `tion I4 it may have a smooth sided portion I5 terminating in a shoulder I6 and may have a rounded or tapered portion I1 which, in the form '25 here shown, communicates nally with a reduced cylindrical section I8.

As shown in Figure 2 the joint is complete and it will be noticed that the flared end 2 of the tube does not contact the inner end I9 of the 30 cylindrical portion I8 nor does it contact the sides of that portion. The clearances in the figure have been exaggerated to bring out the fact that the seal is not made at the inner end of the tube. 'I'he tube may, o f course, contact 85 the shoulder I9 or the walls I8 or both, but this is not necessary for the lseal and whether or not it occurs is immaterial. The seal is made by the discs! and I which are in contact with some' l portion of the inner walls of the member I2 and 40 which are under compression from the memberA .8. This member is screwed tightly in placeand through the contact oi theland I6 on the fric- A tion reducing washer 5, compression is exerted uponthe discs 3 and I. Where the coupling is 45 associated in a pressure system iiuid pressure is. exerted against the disc 3 and through it com presses the total mass of discs, whether one or -I more is used. For some purposes one only will be used and forsome purposes more than two will be used. As the members I and l come under compression, both mechanical, from the nut 1, and fluid from the lluid within the system, they are caused to engage not merely the interior walls orthemember I2 butarealso'causedtoengage u the exterior of the tube l tightly, and the seal is made in these two zones by the compressible discs 3 and d.

'I'he form of the device shown in Figure 3 is generally the same as that in Figure 2. The tube is substantially the same although, as in the case of the device of Figure l, instead of the are 2 a ringor disc may be used secured to the inner end of the tube. The member 2li is generally analogous to the member l2 but is changed` in its shape and proportions. It will normally be interorly threaded as at 2i at one' end and as at 22 at tlie opposite end. Inwardly from the threading 22 it has a generally un threaded portion 23 terminating in a shoulder 2d. It has a second unthreaded portion 25 terminating in a shoulder 26 and aypassage 2l continuing through the member.- In the particular form of Figure 3 a single compressible disc 28 is shown about the tube l and seated against the shoulder 2d. More than one disc might be used. An antifriction washer 29. Iis positioned about the tube and against the disc 28. The parts are heldin place and the coupling is completed by a nut v3i! which fits about the 4tube and is screwed or rotated with respect to it. It is provided with a threaded portion 3i to mesh with threads 22 on the interior of the member 2@ and may be squared or given. any suitable shape 32 by means of which it may be readily turned to be put into place orv removed. It might have members 9, as shown in Figure 1, or their equivalents. As shown in Figure 3 the inner end 2 of the tube i is not seated against the shoulder 2S nor does it contact the inner surface of the portion 25. It is to be understood as in the case of Figure 2, that contact at one or both of these places might occur, but the contact is not essential for a. perfect seal and the seal occurs at the compressible disc or Washer 28 which, when it is under mechanical compression or iiuid compression, or both, makes a seal about the exterior of the tube and Iagainst some portion of the inner surface of the member 20.

A further modification is shown in Figure -4 in which a short tube 33 is provided at whatl will be its inner end with a ring 34 which is welded or soldered in place. Adjacent this end are. two vcompressible discs or washers 35. and

36 and an antifriction washer 3l which may be provided with a clearance so that it can move freely with respect to the tube 33. A Wingnut 38 is provided with the wings 39 by means of which it may be put into place and removed.

It is exteriorly threaded as at 40 and may bel cut away as at 4I to provide what is in effect a raised land 42. This device may be used generally in the association shown in Figures 1', 2 and 3 and threading 40 engages some suitable threading on the interior of a member to which the coupling is to be attached. At its outer end the tube 33 may'havethe shape indicated in Figure 4- as at 43, so that a rubber or other relatively flexible hose may be slipped over and held in place. A collar 44 may be added to limit thel inward movement of the hose. v

In the form of Figure 5 the coupling is used not on a hollow tube but it provides a seal for a. plug, 45. As thus shown the parts in addition to the plug are the same as those shown in Figure 4. They are shown before insertion in substituted in theforms of the'device shown in Figures 12 and 3.

Since the members '3d andfdt oi Fig. 5 perform exactly the same functions as corresponding members in Fig. 4, they'have been given `the same numbers.

The use and operation of the device as shown in the various forms of vFigures 1 to 4, inclusive,-

The joint includes a` are generally the same. tubularvmember having an enlarged end produced in any desired manner. and about the tube, preferably adjacent this enlarged' end,

'are positioned one or more sealing members together with a friction reducing washer of metallic or other material harder than the sealing members, and lastly, a seeming nut is positioned about the tube and adjacent the sealing parts and means are provided for rotating the nut. The parts thus far described are received in any desirable tting, which may be arranged to receive it. The inner end of the tube does not of necessity contact any part of the fitting within which it is received. In some cases it may do so but it need not and whether it does or not, is immaterial to the eiectiveness of the seal.

Whatever the shape of the member within which the sealing parts are received, those parts, in sealing position, contact the inner surfaces of the walls of the receiving member and are held in place and put under mechanical compression therein 'by the securing nut. When suitable compression has been thus applied, the sealing member is forced against the tube with sealing contact and against the inside surfaces of'the receiving member. In ordinary use, the joint is used in connection with systems in which fluid pressure is present and this uid pressure may `be effective upon the sealing members to further compress them and thus to further in'- crease the effectiveness of thesealing.

In the modied form of Figure 5 the same sealing eiect is accomplished as that of. the

other forms but the joint acts as a. plug and seal.v f

rather than as a seal fora tube which projects beyondthe joint. The sealing eect is, however, obtained in the same manner.

I claim:

In combination in a pipe joint, a hollow receiving' member shaped interiorly to provide a packing seat, a pipeinserted within said receiving member, a fastening nut positioned about RALPH n. EvAR'rs. v 

